code: def setUpClass(cls):
      import random
  
      random.seed(18719)
      cls.random = random
      cls.range = 10000
  
imports: from algorithms.tree.traversal import preorder, preorder_rec, postorder, postorder_rec, inorder, inorder_rec
  from algorithms.tree.b_tree import BTree
  from algorithms.tree import construct_tree_postorder_preorder
  from algorithms.tree.fenwick_tree.fenwick_tree import Fenwick_Tree
  import unittest
label_desc: Use image node_id 1 for calling the TestBTree obj's underlying member method code with example usage: obj.setUpClass(cls) without return types